Prognosis is very good because... (1) Return to cyclicity in 3 months to 2 years (2) Return to normal fertility with regular estrous cycles (3) No (minimal) risk for metastasis

teratoma: cells of origin? Is it hormonally active? does it affect the fxn of the ovary/ contralateral ovary? does it metastasize? tx?

Origin: germinal cells, Not hormonaly active, No effect on ovarian function, and Contralateral ovary is active. No metastases! Very rare and chance finding, removal not necessary

Cystadenoma: cells of origin? how is the ovary affected? contralateral ovary? does it metastasize? tx?

Neoplasia of the superficial epithelium of the ovary. Enlarged, absence of ovulation fossa, Contralateral ovary is normal and active (vs. GCT where it is small and inactive). Very slowly enlarging, Surgery but not urgent, no metastasis.

how does a cystadenoma appear on U/S?

spectacular large number of small cysts (honeycomb) DDx: GCT

dysgerminoma: cells of origin? how does the affected ovary appear? contralateral ovary? does it have hormonal involvement? tx? does it metastasize?